Electric-welding clamp.



(N01 864,348. PATENTED AUG. 27, 1907.

I w. E., WILLIAMS.

ELECTRIC WELDING CLAMP.

APPLICATION FILED JULY 21 1905.

UNITED STATES WILLIAM ERAgTUS WILLIAMS. OF CHICAGO, ILLINQIS.

ELECTRIC-WELDING CLAMP Specification of Letters Patent.

Patented Aug. 27, 1907 Application filed July 21, 1905. Serial No. 270,730-

To all whom it may concern: I

Be it known that 1, WILLIAM Enss'rus WILLIAMS, a citizen of the United States of America, anda resi- I dent of Chicago, county of Goolgand State of Illinois, have invented certain new and useful Improvements I in Electric-Welding Clamps, of which the following is a specification.

The object of my invention is to provide electric welding clamps peculiarly adapted for making lap welds and for welding a wide range of work, such as chairs, tables, fence posts, ladders and numerous I other articles.

Reference will be had to the ing in which Figure 1, is a sectional elevation, Fig. 2, is a plan view. Fig. 3 is a detail on line 3-3 of Fig. 2. Fig. 4- is an end elevation.

In the drawings, 1 designates the cast iron frame inclosing the ordinary transformer coils 2 of which is the primary and 3 the secondary. The secondary is provided with contact sur aces 4 in close electrical connection with electrode blocks 5 and 6, which are mounted in suitable guideways 30 and 31 to slide to and from each other. The block 5 and its guidewaysare insulated from the frame 1 by insulating material 7. I I

Mounted in vertical guides 8 on block 6 there is an electrode block or arm 9 arranged to work ver-' tically by means of a hand lever 10 or other suitable means. A flexible electric conductor 11 aids in carrying current bctween'blocks 6 and 9. Fixed by screw 13 to projection1 2 of block 9 there is a contact piece 14 which may be revolved around the screw 13 in its adjustments in bringing the contact seatsl8 in the right position to lit the parts to be welded. Resting on block 5 and held thereto by a stud 15 there is the lower contact piece 16 which may be adjusted by revolving it about the stud as an axis. Pins17 enable the operator to revolve the blocks as desired.

The seats 18 in contact blocks 14 and id are here shown for welding round rods to each other at their crossings and by the adjustments of the blocks the rodsmay be welded in almost any relation to each other.

The block 5 is adjusted in horizontal position by the screw rod 19 moved by a hand wheel 20, and ,blocl: 6 is' moved horizontally by a hand .lever 21 ivoted at'22 and connected by link 23 to block 6 position byapin 24 in asegaccompanying drawsecured in fixed 1 ment, 25. Thus any desired horizontal position of the partsmay be secured permitting different sizes of blocks 9 having longer or shorter projections 12 .10 ,be, used for variation in the world The controlb 5 ling lever 10 is connected at 26 toblock 9 and pivoted .trodc block at 27 to a block 28 on bloclfib and moves with block 6 in its adjustments.

The arrangements of the device is such that a large grillage, chair back, or any similar structure may be welded together by lap welds, whenever there are apertures in the structure that p'ermitthe' entry of the head of block 9 through them adjacent to'the welding points.

Rods 29 are shown in the clamps in the act of Welding.

What I claim is:

1. in a welding device, the combination with two electrode blocks mounted to move toward and from each other, of a contact piece borne by onei'oi' said blocks, and a second, co-acting contact piece carried by the other block and arranged to move, transversely to the plane of said blocks, to and from its companion, to grip the work at the welding point. i

in a welding device, the combination with two electrode blocks; or means for adjusting their distance apart in their plane, a revolubly adjustable contact piece p1'0 jecting from one of said blocks transversely to their plane, a second, co-actmg contact piece carried by the other block and arranged to move toward and from said plane, to grip thework st the welding point. v

, 3. In a welding device, the combination with two priration, of a secondary electrode block mounted upon one of the primary blocks to move transversely to the. plane of. the latter, a contact piece borne upon one'iateral face 01. the other primary block, a second, co-actlng contact piece borne by which carries it 4. Insweldingflevice, the combination with two elec trode blocks mounted to move independently toward-and from each other, of a lever arranged to move one block back and forth in its path, a screw arranged to adjust the other block in its path, a removable contact piece projecting laterally from one of the blocks, a second, co-zicting contact piece carried by the other blockln the axial line or the first contact piece when the parts are properly adjusted, and means for at will moving the second contact piece to and from its companion.

5. The combination with a suitable frame, of an electrode block mounted thereon to move back and forth and provided with a lateral, i'evolubly adjustable contact piece, of means for forcibly moving said block in its path, a second electrode in the and provided with-a contact blociroverhanging its com punlon, means for at will forcibly varying the separation of the two co-acting contact blocks, and means for supplying a welding current through said electrodes, contact blocks, and the work interposed between the latter.

6. The combination with a suitable frame, ofan elecmounted to move back-and forth thereon, a contact block projecting from said block and revolubly adjustable thereon, a second electrode block mounted in justed, and means for moving the second contact piece toward and from its companion 7. The combination with a. suitable frame, of twoprimnry electrode blocks mounted thereonlto move toward line of movement of the first mary electrode blocks and means for adjusting their sepaand from each other, a secondary electrode block mounted upon one of the first mentioned blocks to move hack and forth thereon in a direction transverse to the plane of the latter and to overhang the companion p1'l mary block, two co-actlng contact pieces mounted npon the overhanging secondary block and the companion prl- -ma1-y block, respectively, and. means for at will putting 0neprin'1ary'block, the secondary block. its contact piece, the "work, the other contact piece and the other primary block in a welding circuit.

8. In a welding device, hlocksmonntcd to move to and from each other, a seca set of movable electrode WILLIAM ERASTUS WILLIAMS.

Witnesses WILLIAM F. Dnxrnnr, Join: W. Wimun. 

